Regionality of Resistant Elements and Weight in Traditional Wooden Houses in Japan

Abstract eng:
There is one of the questions with evaluating seismic performance of traditional wooden houses in Japan that structural characteristics of them are different by region. However, the regionality of the structural characteristics of the houses has not been clear adequately, and there has been no study that tried to analyze the regionality quantitatively. The purpose of this study is to understand the differences in resistant elements and weight of traditional wooden houses among regions which is largely related to the seismic performance of houses. Our conclusions are as follows. 1) Regionality is observed for yield shear force per unit 1st floor area Qy/A1 and in breakdown by resistant elements. 2) The weight per unit 1st floor area W/A1 vary from regions to compare, depending on specifications of the roofs and walls in houses. 3) There is a strong correlation in both weak and strong direction between the total length of the full walls in 1st floor per weight L1/ W and the natural frequency f and between the total length of full walls in 1st floor per unit 1st floor area L1/ A1 and the yield base shear force per unit 1st floor area Qy/A1. 4) There is also a strong correlation between the natural frequency f and the yield base shear coefficients Cy except for the houses in a region where ambient vibration measurements was conducted immediately after the earthquake occurred.

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